package com.tanhua.dubbo.server.service;

import cn.hutool.core.util.ObjectUtil;
import cn.hutool.core.util.StrUtil;
import cn.hutool.http.HttpRequest;
import cn.hutool.http.HttpResponse;
import cn.hutool.json.JSONObject;
import cn.hutool.json.JSONUtil;
import com.tanhua.dubbo.server.config.HuanXinConfig;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@Service
@Slf4j
public class TokenService {
    @Autowired
    private RedisTemplate<String, String> redisTemplate;
    @Autowired
    private HuanXinConfig huanXinConfig;

    private static final String REDIS_KEY = "HX_TOKEN";

    public String getToken() {

        String token = redisTemplate.opsForValue().get(REDIS_KEY);
        if(ObjectUtil.isNotEmpty(token)){
            return token;
        }
        return this.refreshToken();
    }

    public String refreshToken() {
        String targetUrl=huanXinConfig.getUrl()+huanXinConfig.getOrgName()
                +"/"+huanXinConfig.getAppName()+"/token";
        Map<String, Object> param = new HashMap<>();
        param.put("grant_type","client_credentials");
        param.put("client_id",huanXinConfig.getClientId());
        param.put("client_secret",huanXinConfig.getClientSecret());

        HttpResponse response = HttpRequest.post(targetUrl)
                .body(JSONUtil.toJsonStr(param))
                .timeout(20000)
                .execute();
        if(!response.isOk()){
            log.error("刷新token失败!");
            return null;
        }
        String jsonBody = response.body();
        JSONObject jsonObject = JSONUtil.parseObj(jsonBody);
        String token = jsonObject.getStr("access_token");
        if(StrUtil.isNotEmpty(token)){
            //将token数据缓存到redis中，缓存时间由expires_in决定
            //提前1小时失效
            long timeout = jsonObject.getLong("expires_in") - 3600;
            this.redisTemplate.opsForValue().set(REDIS_KEY, token, timeout, TimeUnit.SECONDS);
            return token;
        }
        return null;
    }


}
